We got the Red Card, credit card this past Sunday. So far, in 2 trips, we've saved over $4.00. It's not much but then again, I didn't buy much yet. We have the American Express with cash rewards but only 1% on purchases like Target so we're getting more with the Red Card. I won't use a debit card and I'm glad they offered the credit card.
I applied for the card in my name and they printed up a receipt that is scanned as the card until the actual card comes in the mail. At the bottom of the transaction receipt, they print off how much you've saved using the card.
Even Clark Howard, consumer guru, recommends the Red Card as the only store card he has endorsed.